Find the variants that are NOT correct: 1. He...have made a mistake a) must b) mustn't ...

Question

Find the variants that are NOT correct:
1. He...have made a mistake
a) must
b) mustn't
c) can't
d) shouldn't
2. She saw the man...the purse
a) took
b) taking
c) take
d)who had taken
3. He was sure that he..it well
a) does
b) had done
c)would do
d) was doing

Answer 1

Насчет третьего не уверен т.к. не понял особо контекст, но должно подойти.
1)c
2)b
3)d